CN114190852A - Water inlet anti-overflow control method of dish washing machine and dish washing machine - Google Patents

Abstract

The invention discloses a dish washing machine and a water inlet anti-overflow control method thereof. The water inflow anti-overflow control method comprises the following steps: s1: the dishwasher is standby; s2: detecting a real-time water level in the dishwasher; s3: the flow meter detects whether flow pulse exists in the dish washer, if so, the step of fault processing is carried out, and if not, the step of S4 is carried out; s4: judging whether a low water level switch of the dish washing machine is triggered, if so, entering a fault processing step, otherwise, starting a drainage pump to empty water in the dish washing machine; s5: opening a water inlet valve; s6: for water inlet time length T₂Timing and pulsing Wf of flowmeter₁Counting is carried out; s7: judging whether a low water level switch is triggered, if so, recording the pulse number Wf2 of the flowmeter at the moment; s8: determining Wf₂Whether the water level is less than the lower limit water level Wf triggered by the low water level switch_minIf yes, judging that the flowmeter is abnormal, and entering a fault processing step. The invention provides a washing machineThe bowl machine operates by adopting the water inlet anti-overflow control method.

Description

Water inlet anti-overflow control method of dish washing machine and dish washing machine

Technical Field

The invention relates to the technical field of kitchen electricity, in particular to a dish-washing machine and a water inlet anti-overflow control method thereof.

Background

At present, the overflow detection of the dish washing machine is generally realized by a high water level pressure switch, but in the practical application process, the precision of the high water level pressure switch is insufficient, so that on one hand, the dish washing machine is easy to cause the condition that the water level exceeds the limit, but the high water level switch is not triggered, and then the overflow is caused; on the other hand, the dishwasher is easy to trigger the high water level pressure switch by mistake in the process of water inlet, and then the water pump discharges water by mistake.

Therefore, there is a need for an anti-overflow control method of a dishwasher to solve the above problems.

Disclosure of Invention

The invention aims to solve at least one of the problems in the prior related art to a certain extent, and therefore the invention provides a water inlet anti-overflow control method of a dish washing machine, which can realize the water inlet anti-overflow effect of the dish washing machine.

The above purpose is realized by the following technical scheme:

a water inlet anti-overflow control method of a dishwasher comprises the following steps:

s1: the dishwasher is standby;

s2: detecting a real-time water level in the dishwasher;

s3: the flow meter detects whether flow pulse exists in the dish washer, if so, the step of fault processing is carried out, and if not, the step of S4 is carried out;

s4: judging whether a low water level switch of the dish washing machine is triggered, if so, entering the fault processing step, otherwise, starting the drainage pump to empty the water in the dish washing machine;

s5: opening a water inlet valve;

s6: for water inlet time length T₂Timing and pulsing Wf of flowmeter₁Counting is carried out;

s7: judging whether a low water level switch is triggered, if so, recording the pulse number Wf2 of the flowmeter at the moment;

s8: determining Wf₂Whether the water level is less than the lower limit water level Wf triggered by the low water level switch_minIf yes, judging that the flowmeter is abnormal, and thenEntering the fault processing step, and if not, entering S9;

s9: determining Wf₂Whether the water level is greater than the lower limit water level Wf triggered by the low water level switch_maxIf yes, judging that the low water level switch is abnormal, entering the fault processing step, and if not, entering S10;

s10: judging whether T is present₂≥T_{Preset of}If yes, the process proceeds to S11, otherwise, the process repeats S10;

s11: every interval set time T₃Recording the real-time pulse number Wf of the flowmeter₃；

S12: according to the real-time pulse number Wf₃Calculating the water inlet time T from the empty water level to the overflow water level of the water in the dish-washing machine₄And/or calculating the time T from the triggering of the low water level switch to the overflow water level of the water in the dishwasher₅；

S13: the water inlet time of the dishwasher is T₄And/or T₅When, or when Wf₂＝Wf₄When the water is not fed, stopping feeding water;

wherein, Wf₄The number of pulses for reaching the target level from the empty level.

Optionally, in S7, if the low water level switch is not triggered, the process proceeds to S14: judging whether T is present₂≥T_{Preset of}If yes, recording the pulse number Wf of the flowmeter at the moment₂If not, returning to S7;

s15: judging whether Wf₂＜Wf_{Preset of}If yes, the water inlet valve is judged not to be opened, the fault processing step is carried out, and if not, the step is carried out to S11.

Optionally, the fault handling steps are specifically as follows:

s100: draining pump of dish washing machine is started and is operated for preset time length T₁；

S200: and sending an alarm to prompt a user that the dishwasher is in failure.

Optionally, the Wf_minIs 50-200 pulses.

Optionally, the Wf_max300-500 pulses。

Optionally, the Wf_{Preset of}From 1 to 50 pulses.

Optionally, the T_{Preset of}Is 10-60 seconds.

Optionally, the set time T₃Is 8-15 seconds.

Optionally, the Wf_min＝V_min/Fs, wherein V_minAnd the minimum water flow when the low water level switch is triggered, and the Fs is the flow pulse number of one liter of water calculated by the flowmeter.

Optionally, the Wf_max＝V_max/Fs, wherein V_maxThe maximum water flow when the low water level switch is triggered.

Optionally, the water inlet time T₄＝(V₁/Fs)/Vs, said intake time T₅＝(V₂/Fs)/Vs；

Wherein Vs is the real-time inflow rate, and Vs is Wf₂/T_3；

V₁The amount of water required to reach the spill-proof water level from the empty water level;

V₂the amount of water required to trigger the water level from the low level switch to the anti-spill level.

Optionally, in S7, if the low water level switch is triggered, the method further includes the following steps:

s71: judging whether Wf_min≤Wf₂≤Wf_maxIf so, judging that the flow meter and the water inlet valve are normal, otherwise, judging that the flow meter and/or the water inlet valve are abnormal, and entering S72;

s72: the pulse count of the flow meter is calibrated.

Optionally, in S72, the pulse count of the flow meter is specifically obtained by calibrating according to the following equation:

K＝Wf₂/Wf_{setting up}＝V₃/V_{Setting up}＝Wf₄/Wf_Target；

Wherein: wf_{Setting up}The set flow pulse number for triggering the low water level switch from the empty water level;

Wf₂the actual flow pulse number that reaches the trigger low level switch from the empty water level;

V_{setting up}To reach the set water volume required for triggering the low water level switch from the empty water level, V₃The actual water amount required for triggering the low water level switch is reached from the empty water level;

Wf_targetFor a target number of pulses, Wf, to reach a target level of intake water from an empty level₄＝K×Wf_Target。

The invention also provides a dish washing machine which is operated by adopting the water inlet and overflow prevention control method.

Compared with the prior art, the invention at least comprises the following beneficial effects:

the invention provides a water inlet anti-overflow control method of a dish washing machine, which judges whether a water inlet valve is abnormal or not by detecting the real-time water level and the pulse flow of the dish washing machine in a standby state, and enters a fault processing step when the water inlet valve is abnormal, so that the condition that the dish washing machine overflows due to the fact that the dish washing machine still runs under the condition of faults is avoided. Before the water inlet valve is opened, the water pump is firstly opened to evacuate residual water in the dish washing machine, accumulated water can be prevented from remaining in the dish washing machine, the dish washing machine is further prevented from working, when the inflow reaches a target inflow water level, the accumulated water is added to the original water in the dish washing machine, and the dish washing machine overflows. The invention also provides a water inlet anti-overflow control method of the dish-washing machine, which counts the water inlet time length T2 and the flow meter pulse, judges the flow pulse number of the flow meter when the water inlet time length reaches T2, and the flow pulse number is larger than the upper limit water level Wf triggered by the low water level switch_maxIf so, the low water level switch is judged to be abnormal. Or the number of the flow pulses is less than the lower limit water level Wf triggered by the water level switch_minIn the present embodiment, the detection and judgment of the low water level switch abnormality and the flow meter abnormality further provides a measure for determining that the flow meter is abnormal, and in both cases, the low water level switch abnormality or the flow meter abnormality is both abnormal for the dishwasher, which can cause the overflow of the dishwasher in the dish washing processThe possibility of water overflow of the dishwasher is eliminated. After the abnormal states of the water inlet valve, the low water level switch and the flow meter are eliminated, the interval setting time T₃Water is fed in and the real-time flow pulse number Wf of the flowmeter is recorded₃Then by the real-time flow pulse number Wf₃Calculating the water inlet time T from the empty water level to the overflow water level of the water in the dish washer₄And/or calculating the time T from the triggering of the low water level switch to the overflow water level of the water in the dishwasher₅So as to obtain the water inlet time T from empty water level to overflow water level of water in the dish-washing machine₄And/or the time T from the triggering of the low water level switch to the overflow water level of the water in the dishwasher₅When the water inlet time reaches T₄And/or T₅When, or Wf₂＝Wf₄And when the water is overflowed, the water inlet is stopped, so that the effect of preventing the overflow is realized. In this embodiment, the water inlet time T is judged₄And T₅The method and the device can realize double judgment of reaching the overflow water level, and have the advantages of stability and accuracy compared with a mode of judging whether the overflow water level is reached or not only by one water inlet time.

Drawings

FIG. 1 is a step diagram of a method for controlling an overflow prevention of a dishwasher according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the water inlet of a dishwasher according to an embodiment of the present invention.

In the figure:

1. a body;

2. a low water level switch; 21. an air chamber;

3. a flow meter;

4. a water inlet valve;

5. a pipeline.

Detailed Description

The present invention is illustrated by the following examples, but the present invention is not limited to these examples. Modifications to the embodiments of the invention or equivalent substitutions of parts of technical features without departing from the spirit of the invention are intended to be covered by the scope of the claims of the invention.

Referring to fig. 1 and 2, the present invention provides a method for controlling an overflow prevention of a dishwasher, comprising the steps of:

s1: the dishwasher is standby;

s2: detecting a real-time water level in the dishwasher;

s3: the flowmeter 3 detects whether the dishwasher has flow pulse, if so, the step of fault processing is carried out, and if not, the step of S4 is carried out;

s4: judging whether a low water level switch 2 of the dish washing machine is triggered, if so, entering a fault processing step, otherwise, starting a drainage pump to empty water in the dish washing machine;

s5: opening the water inlet valve 4;

s6: for water inlet time length T₂Time-measuring and pulse Wf to flow meter 3₁Counting is carried out;

s7: judging whether the low water level switch 2 is triggered, if so, recording the pulse number Wf of the flowmeter 3 at the moment₂；

S8: determining Wf₂Whether or not the water level is less than the lower limit water level Wf triggered by the low water level switch 2_minIf yes, determining that the flowmeter 3 is abnormal, and proceeding to a failure processing step, otherwise, proceeding to S9;

s9: determining Wf₂Whether it is larger than the upper limit water level Wf triggered by the low water level switch 2_maxIf yes, judging that the low water level switch 2 is abnormal, entering a fault processing step, and if not, entering S10;

s10: judging whether T is present₂≥T_{Preset of}If yes, the process proceeds to S11, otherwise, the process repeats S10;

s11: every interval set time T₃Recording the real-time pulse number Wf of the flowmeter 3₃；

S12: according to the real-time pulse number Wf₃Calculating the water inlet time T from the empty water level to the overflow water level of the water in the dish-washing machine₄And/or calculating the time T for the water in the dishwasher to trigger from the low level switch 2 to the overflow level₅；

S13: the water inlet time of the dishwasher is T₄And/or T₅When, or when Wf₂＝Wf₄When the water is not fed, stopping feeding water;

wherein, Wf₄Number of pulses for reaching target level by water intake from empty level, e.g. Wf₄500-.

The invention provides a water inlet anti-overflow control method of a dish washing machine, which judges whether a water inlet valve 4 is abnormal or not by detecting the real-time water level and the pulse flow of the dish washing machine in a standby state, and enters a fault processing step when the water inlet valve 4 is abnormal, so that the condition that the dish washing machine overflows due to the fact that the dish washing machine still runs under the condition of faults is avoided. Before the water inlet valve 4 is opened, the water pump is firstly opened to evacuate residual water in the dish washing machine, accumulated water can be prevented from remaining in the dish washing machine, the dish washing machine is further prevented from working, when the inflow reaches a target inflow water level, the inflow water reaches the target inflow water level, the inflow water is added to the original water in the dish washing machine, and the dish washing machine overflows. The invention also provides a water inlet anti-overflow control method of the dish-washing machine, which counts the water inlet time length T2 and the pulse of the flow meter 3, judges the flow pulse number of the flow meter 3 when the water inlet time length reaches T2, and the flow pulse number is larger than the upper limit water level Wf triggered by the low water level switch 2_maxIf so, it is determined that the low level switch 2 is abnormal. Or the number of the flow pulses is less than the lower limit water level Wf triggered by the water level switch_minIn the above two cases, whether the low water level switch 2 is abnormal or the flow meter 3 is abnormal, the abnormality of the dish washer can be caused, and the overflow of the dish washer can be avoided, therefore, the present embodiment detects and judges whether the low water level switch 2 is abnormal or the flow meter 3 is abnormal, and the possibility of the overflow of the dish washer can be further eliminated. After the abnormal states of the water inlet valve 4, the low water level switch 2 and the flowmeter 3 are eliminated, the interval setting time T₃Water is fed in and the real-time flow pulse number Wf of the flowmeter 3 is recorded₃Then by the real-time flow pulse number Wf₃Calculating the water inlet time T from the empty water level to the overflow water level of the water in the dish washer₄And/or calculating the time T for the water in the dishwasher to trigger from the low level switch 2 to the overflow level₅So as to obtain the water level from empty water level to overflow water level in the dish-washing machineWater inlet time T of the bit₄And/or the time T for the water in the dishwasher to trigger from the low level switch 2 to the overflow level₅When the water inlet time reaches T₄And/or T₅When, or Wf₂＝Wf₄And when the water is overflowed, the water inlet is stopped, so that the effect of preventing the overflow is realized. In this embodiment, the water inlet time T is judged₄And T₅The method and the device can realize double judgment of reaching the overflow water level, and have the advantages of stability and accuracy compared with a mode of judging whether the overflow water level is reached or not only by one water inlet time.

Alternatively, in S7, if the low level switch 2 is not triggered, the process proceeds to S14: judging whether T is present₂≥T_{Preset of}If so, the number of pulses Wf at the time of the flowmeter 3 is recorded₂If not, returning to S7;

s15: judging whether Wf₂＜Wf_{Preset of}If yes, it is judged that the water inlet valve 4 is not opened, and the fault processing step is entered, and if no, the process proceeds to S11.

Optionally, the fault handling steps are specifically as follows:

s100: draining pump of dish washing machine is started and runs for preset time length T₁；

S200: and sending an alarm to prompt a user that the dishwasher is in failure. To inform the user of the service treatment of the dishwasher.

Further, the draining pump is started and operated for a preset time period T₁Is 30-100 seconds.

Alternatively, Wf_minIs 50-200 pulses. Preferably, Wf in the present embodiment_minPreferably 100 pulses.

Alternatively, Wf_max300-. Preferably, Wf in the present embodiment_maxPreferably 100 pulses.

Alternatively, Wf_{Preset of}From 1 to 50 pulses. Wf in the present embodiment_{Preset of}Preferably 30 pulses.

Alternatively, T_{Preset of}Is 10-60 seconds. T in the present embodiment_{Preset of}Preferably 30 seconds.

Optionally, a time T is set₃Is 8-15 seconds. Preferably, the time T is set in the present embodiment₃Preferably 10 seconds.

Alternatively, Wf_min＝V_min/Fs, wherein V_minFor the minimum water flow rate at the time of activation of the low level switch 2 (which value can be obtained by empirical measurements), Fs is the number of flow pulses for one litre of water calculated using the flow meter 3, for example Fs for some flow meters 3 is 217/L.

Alternatively, Wf_max＝V_max/Fs, wherein V_maxIs the maximum water flow (which can be obtained by empirical measurements) at the time of activation of the low level switch 2.

Alternatively, T₄＝(V₁/Fs)/Vs，T₅＝(V₂/Fs)/Vs；

Wherein Vs is the real-time inflow rate, and Vs is Wf₂/T_3；

V₁The amount of water required to reach the spill-proof water level from the empty water level;

V₂the amount of water required to trigger the water level from the low level switch 2 to the anti-spill level.

Optionally, in S7, if the low water level switch 2 is triggered, the method further includes the following steps:

s71: judging whether Wf_min≤Wf₂≤Wf_maxIf so, judging that the flow meter 3 and the water inlet valve 4 are normal, otherwise, judging that the flow meter 3 and/or the water inlet valve 4 are abnormal, and entering S72;

s72: the pulse count of the flow meter 3 is calibrated.

Alternatively, in S72, the pulse count of the flow meter 3 is specifically obtained by the following mathematical calibration:

K＝Wf₂/Wf_{setting up}＝V₃/V_{Setting up}＝Wf₄/Wf_Target；

Wherein: wf_{Setting up}The number of flow pulses (which can be obtained by empirical measurements) to reach the set flow level that triggers the low level switch 2 from the empty level;

Wf₂the actual number of flow pulses that reach the trigger low level switch 2 from the empty level;

V_{setting up}V to reach the set water level (which can be obtained by empirical measurement) required to trigger the low level switch 2 from the empty water level₃The actual amount of water needed to trigger the low level switch 2 from the empty level;

Wf_targetWf for the target number of pulses for water intake from an empty water level to reach the target water level (which value can be obtained by empirical measurements), Wf₄＝K×Wf_Target。

The invention also provides a dishwasher which is operated by adopting the water inlet and overflow prevention control method.

Optionally, referring to fig. 2, the dishwasher includes a body 1, an air chamber 21 disposed at one side of the body 1, and a pipe 5 communicated with the body 1, wherein the pipe 5 is provided with a water inlet valve 4 and a flow meter 3, and the pipe 5 is communicated with a water supply pipe outside the dishwasher. Wherein, can hold the washing liquid in the organism 1 to, be provided with the upper limit water level that low water level switch triggered, the lower limit water level that low water level switch triggered, target water level and anti-overflow water level on the organism 1. The lower side of the machine body 1 is provided with an opening which is communicated with an air chamber 21, and the upper part of the air chamber 21 is provided with a low water level switch 2. The low water level switch 2 is a pressure switch, and when the pressure in the air chamber 21 is higher as the water in the machine body 1 is higher, the low water level switch 2 is turned on when the pressure reaches the pressure range of the on state of the low water level switch 2 (namely, the water amount in the machine body 1 is between the upper limit water level triggered by the low water level switch 2 and the lower limit water level triggered by the low water level switch 2).

What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.

Claims (14)

1. A water inlet anti-overflow control method of a dishwasher is characterized by comprising the following steps:

s1: the dishwasher is standby;

s2: detecting a real-time water level in the dishwasher;

s3: the flow meter detects whether flow pulse exists in the dish washer, if so, the step of fault processing is carried out, and if not, the step of S4 is carried out;

s4: judging whether a low water level switch of the dish washing machine is triggered, if so, entering the fault processing step, otherwise, starting the drainage pump to empty the water in the dish washing machine;

s5: opening a water inlet valve;

s6: for water inlet time length T₂Timing and pulsing Wf of flowmeter₁Counting is carried out;

s7: judging whether a low water level switch is triggered, if so, recording the pulse number Wf2 of the flowmeter at the moment;

s8: determining Wf₂Whether the water level is less than the lower limit water level Wf triggered by the low water level switch_minIf yes, determining that the flowmeter is abnormal, and entering the fault processing step, otherwise, entering S9;

s9: determining Wf₂Whether the water level is greater than the lower limit water level Wf triggered by the low water level switch_maxIf yes, judging that the low water level switch is abnormal, entering the fault processing step, and if not, entering S10;

s10: judging whether T is present₂≥T_{Preset of}If yes, the process proceeds to S11, otherwise, the process repeats S10;

s11: every interval set time T₃Recording the real-time pulse number Wf of the flowmeter₃；

S12: according to the real-time pulse number Wf₃Calculating the water inlet time T from the empty water level to the overflow water level of the water in the dish-washing machine₄And/or calculating the time T from the triggering of the low water level switch to the overflow water level of the water in the dishwasher₅；

S13: the water inlet time of the dishwasher is T₄And/or T₅When, or when Wf₂＝Wf₄When the water is not fed, stopping feeding water;

wherein, Wf₄The number of pulses for reaching the target level from the empty level.

2. The water inflow anti-overflow of the dishwasher of claim 1In the step S7, if the low water level switch is not activated, the control method proceeds to step S14: judging whether T is present₂≥T_{Preset of}If yes, recording the pulse number Wf of the flowmeter at the moment₂If not, returning to S7;

s15: judging whether Wf₂＜Wf_{Preset of}If yes, judging that the water inlet valve is not opened, starting the water pump and operating the water pump for the preset time T₁If not, the process proceeds to S11.

3. The method for controlling water inflow and overflow prevention of a dishwasher according to claim 2, wherein the fault handling steps are as follows:

s100: draining pump of dish washing machine is started and is operated for preset time length T₁；

S200: and sending an alarm to prompt a user that the dishwasher is in failure.

4. The method of claim 2, wherein Wf is set to a value of Wf_minIs 50-200 pulses.

5. The method of claim 2, wherein Wf is set to a value of Wf_max300-.

6. The method of claim 2, wherein Wf is set to a value of Wf_{Preset of}From 1 to 50 pulses.

7. The method of claim 2, wherein the T is a value of a water inlet overflow prevention control of a dishwasher_{Preset of}Is 10-60 seconds.

8. The water inflow anti-overflow control method of a dishwasher according to claim 3, wherein the set time T₃Is 8-15 seconds.

9. According to claimThe method for controlling water inflow and overflow prevention of a dishwasher according to any one of claims 2 to 8, wherein Wf is set to be equal to or greater than Wf_min＝V_min/Fs, wherein V_minAnd the minimum water flow when the low water level switch is triggered, and the Fs is the flow pulse number of one liter of water calculated by the flowmeter.

10. The water inflow overflow preventing control method of a dishwasher according to any one of claims 2 to 8, wherein Wf is set to a predetermined value_max＝V_max/Fs, wherein V_maxThe maximum water flow when the low water level switch is triggered.

11. The water inflow anti-overflow control method of a dishwasher according to any one of claims 2 to 8, wherein the water inflow time T₄＝(V₁/Fs)/Vs, said intake time T₅＝(V₂/Fs)/Vs；

Wherein Vs is the real-time inflow rate, and Vs is Wf₂/T_3；

V₁The amount of water required to reach the spill-proof water level from the empty water level;

V₂the amount of water required to trigger the water level from the low level switch to the anti-spill level.

12. The water inflow anti-overflow control method of a dishwasher of any one of claims 2 to 8, wherein the S7, if the low water level switch is triggered, further comprises the steps of:

s71: judging whether Wf_min≤Wf₂≤Wf_maxIf so, judging that the flow meter and the water inlet valve are normal, otherwise, judging that the flow meter and/or the water inlet valve are abnormal, and entering S72;

s72: the pulse count of the flow meter is calibrated.

13. The method of claim 12, wherein in the step S72, the pulse count of the flowmeter is obtained by calibration according to the following equation:

K＝Wf₂/Wf_{setting up}＝V₃/V_{Setting up}＝Wf₄/Wf_Target；

Wherein: wf_{Setting up}The set flow pulse number for triggering the low water level switch from the empty water level;

Wf₂the actual flow pulse number that reaches the trigger low level switch from the empty water level;

V_{setting up}To reach the set water volume required for triggering the low water level switch from the empty water level, V₃The actual water amount required for triggering the low water level switch is reached from the empty water level;

Wf_targetA target number of pulses for water intake from an empty water level to a target water level, and Wf₄＝K×Wf_Target。

14. A dishwasher, characterized by operating with the water inlet overflow prevention control method of any one of claims 1 to 13.

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